Foneso F041 Bluetooth Speaker, F1 Portable Wireless Player for Outdoor Travel Bicycle Cycling, 6W Strong Passive Radiator with Remote Controller and Metal Hook Loop This speaker is designed and marketed for a bicycle, it has solid construction, It's water-resistant, shockproof, sleek, small and attractive Bluetooth 4.0 Technology, 2x3w dual 1.5" Speakers in the front and back of the device 4 Working modes: Bluetooth/ tf card / FM/ aux, offers more option of music sources Bicycle mount literally took seconds, I-free integrated controller for convenience and safety control, Use the speaker as bike bell/horn This is great outdoor speaker such as for hiking, bike riding, camping on a beach-cruiser, mountains, on a mountain-bike, skiing, etc.